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作者： Giraldo, Fáber Ochoa, Sergio F. Aballay, Laura Clunie, Clifton Neyem, Andrés Anaya, Raquel System and Computer Engineering University of Quindío Armenia Colombia Computer Science Department University of Chile Santiago Chile Informatics Institute National University of San Juan San Juan Argentina Computational Systems Engineering Technological University of Panama Panama City Panama Computer Science Department Pontifical Catholic University of Chile Santiago Chile System Engineering Department Universidad EAFIT Medellín Colombia

ISBN: (纸本)9783642247743

computer science students must be able to support the global software development phenomena;therefore they should enhance their teamwork, communication, negotiation, leadership and collaboration skills. It pushes the educational institutions to rethink the way in which they are transferring the soft skills, e.g. collaboration capabilities, to the new software engineers. Advances in developing platforms, wideband communications, global markets, technological trends and outsourcing promote the conception of a global software engineering. Trying to help address this issue, this paper describes the results of two experiences where a CODILA (Collaborative and Distributed Learning Activity) was used to solve a software engineering problem in a distributed way. These experiences involved students and instructors of eight Latin American universities. We have measured the development of collaboration skills and satisfaction level of computer science students participating in these distributed collaborative practices, and the obtained results are highly encouraging. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Students

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A domain partition model approach to the online fault recovery of FPGA-based reconfigurable systems

A domain partition model approach to the online fault recove...

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作者： Shang, Lihong Zhou, Mi Hu, Yu Yang, Erfu School of Computer Science and Engineering Beihang University Beijing 100191 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China Department of Electronic and Electrical Engineering University of Strathclyde Glasgow Gl 1XW United Kingdom

Field programmable gate arrays (FPGAs) are widely used in reliability-critical systems due to their reconfiguration ability. However, with the shrinking device feature size and increasing die area, nowadays FPGAs can be deeply affected by the errors induced by electromigration and radiation. To improve the reliability of FPGA-based reconfigurable systems, a permanent fault recovery approach using a domain partition model is proposed in this paper. In the proposed approach, the fault-tolerant FPGA recovery from faults is realized by reloading a proper configuration from a pool of multiple alternative configurations with overlaps. The overlaps are presented as a set of vectors in the domain partition model. To enhance the reliability, a technical procedure is also presented in which the set of vectors are heuristically filtered so that the corresponding small overlaps can be merged into big ones. Experimental results are provided to demonstrate the effectiveness of the proposed approach through applying it to several benchmark circuits. Compared with previous approaches, the proposed approach increased MTTF by up to 18.87%. Copyright © 2011 The institute of Electronics, Information and Communication Engineers.

关键词： Fault tolerance

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A highly interpretable fuzzy rule base using ordinal structure for obstacle avoidance of mobile robot

A highly interpretable fuzzy rule base using ordinal structu...

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作者： Samsudin, Khairulmizam Ahmad, Faisul Arif Mashohor, Syamsiah Intelligent System and Robotics Laboratory Institute of Advanced Technology Universiti Putra Malaysia 43400 Serdang Selangor Malaysia Department of Computer and Communication Systems Faculty of Engineering Universiti Putra Malaysia 43400 Serdang Selangor Malaysia

Conventional fuzzy logic controller is applicable when there are only two fuzzy inputs with usually one output. Complexity increases when there are more than one inputs and outputs making the system unrealizable. The ordinal structure model of fuzzy reasoning has an advantage of managing high-dimensional problem with multiple input and output variables ensuring the interpretability of the rule set. This is achieved by giving an associated weight to each rule in the defuzzification process. In this work, a methodology to design an ordinal fuzzy logic controller with application for obstacle avoidance of Khepera mobile robot is presented. The implementation will show that ordinal structure fuzzy is easier to design with highly interpretable rules compared to conventional fuzzy controller. In order to achieve high accuracy, a specially tailored Genetic Algorithm (GA) approach for reinforcement learning has been proposed to optimize the ordinal structure fuzzy controller. Simulation results demonstrated improved obstacle avoidance performance in comparison with conventional fuzzy controllers. Comparison of direct and incremental GA for optimization of the controller is also presented. © 2010 Elsevier B.V. All rights reserved.

关键词： Genetic algorithms

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Applying a distributed CSCL activity for teaching software architecture

Applying a distributed CSCL activity for teaching software a...

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作者： Giraldo, Fáber D. Herrera, Myriam Neyem, Andrés Arciniegas, José Luis Ochoa, Sergio F. Clunie, Clifton Zapata, Sergio Lizano, Fulvio System and Computer Engineering University of Quindio Armenia Informatics Institute National University of San Juan San Juan Argentina Computer Science Department Pontifical Catholic University of Chile Santiago Chile IDIS University of Cauca Popayan Colombia Computer Systems Engineering Technological University of Panama Panama Informatics School National Autonomous University of Costa Rica Costa Rica

ISBN: (纸本)9780956426383

Teaching and learning software engineering have been recognized as important challenges for computer science students and instructors. These challenges become stronger if we consider the distributed software development scenario that is gaining space everyday into the software industry. In order to help address this challenge, this article introduces a Collaborative and Distributed Learning Activity (CODILA). This collaborative activity helps students to reach the professional skills required in the professional work, and instructors to perform such transfer process. The paper also presents and discusses the obtained results from a particular CODILA, which address the challenge of designing a software architecture of a communication infrastructure in a distributed way. Six Latin American universities participated in the activity. The obtained results were satisfactory and indicate these types of experiences can be used to address the stated challenges. © 2011 IEEE.

关键词： Software architecture

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Hard to access the information in the healthcare system? i See! - An innovative touch-screen information board for pediatric hospitals

Hard to access the information in the healthcare system? i S...

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2011 9th IEEE International Conference on Pervasive Computing and Communications Workshops, PERCOM Workshops 2011

作者： Tseng, Rung-Yu Chuang, Kevin Hermann, Kristin Koehler, Jon Ellen Yi-Luen Do College of Architecture Georgia Institute of Technology Atlanta GA 30332 United States School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 United States Health System Institute Georgia Institute of Technology Atlanta GA 30332 United States College of Computing Georgia Institute of Technology Atlanta GA 30332 United States

ISBN: (纸本)9781612849379

Confusion, frustration and anxiety are caused by the ineffective communication in healthcare system. Patients and family members usually have a hard time to acquire necessary information in hospitals. The healthcare literacy, a wide range of patient-age population, and the text-only teaching sheets are important factors to block the communication. Therefore, the proposed work presents an innovative information board that is designed specifically for current pediatric healthcare environment to deliver messages more effectively through a fun and interactive approach. The I See! system carries four goals: Inform, Set expectation, Educate and Ease Anxiety (I.S.E.E). The innovative I See! system achieves these goals through categories, such as introduction video clip, interactive games, key words section and parents' place. Using different sections in the module, patients and families can engage more effectively in medical procedures. The distinguishing features in I See! module are Age-Adaptable, Audio-Visual, Multi-Lingual, Multi-Sensory, Interactive and Procedural. In addition, this module is a mobile, touch-screen and web-based appliance to prepare patients and families well to take the examinations in hospitals. Lastly, this work also discusses how the information in healthcare system could be delivered to patients and families more efficiently. © 2011 IEEE.

关键词： Hospitals

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An energy-efficient scheduling approach based on private clouds

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Journal of Information and Computational Science 2011年第4期8卷 716-724页

作者： Li, Jiandun Peng, Junjie Lei, Zhou Zhang, Wu School of Computer Engineering and Science Shanghai University Shanghai 200072 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Science Beijing 100190 China

With further development and wide acceptance of cloud computing, lots of companies and colleges decide to take advantage of it in their own data centers, which is known as private clouds. Since private clouds have some unique characteristics and special requirements, it is still a challenging problem to effectively schedule virtual machine requests onto compute nodes, especially with multiple objectives to meet. In this paper, we explore couples of characteristics related to workflow scheduling in the scenario of private clouds and propose a hybrid energy-efficient scheduling approach. The experiments show that it can save more time for users, conserve more energy and achieve higher level of load balancing. Copyright © 2011 Binary Information Press.

关键词： Cloud computing

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A scheduling algorithm for private clouds

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Journal of Convergence Information Technology 2011年第7期6卷 1-9页

作者： Li, Jiandun Peng, Junjie Zhang, Wu School of Computer Engineering and Science Shanghai University Shanghai 200072 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Science Beijing 100190 China

In contrast with public clouds, private clouds have some unique features, especially when related to workflow scheduling. Of course, the tradeoff problem between power and performance remains to be one of the key concerns. Based on our previous research, in this paper, we propose a hybrid energy-efficient scheduling algorithm using dynamic migration. The experiments show that it can not only reduce the response time, conserve more energy, but also achieve higher level of load balancing.

关键词： Scheduling algorithms

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Energy and thermal aware mapping for mesh-based NoC architectures using multi-objective ant colony algorithm

Energy and thermal aware mapping for mesh-based NoC architec...

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IEEE International Conference on computer Research and Development

作者： Liu, Yanhua Ruan, Ying Lai, Zongsheng Jing, Weiping Dept. of Electronic Computer and Software Systems Institute of Microelectronics Circuit and System East China Normal University Shanghai China Dept. of Electronic Engineering Jiangsu Provincial Key Lab. of ASIC Design Nantong University Nantong China

ISBN: (纸本)9781612848372

Where IP cores to be mapped must be carefully solved for any given application in order to optimize different performance metrics in Network-on-Chip (NoC) design flow. The optimization of different performance metrics simultaneously may cause a negative effect on each other because of the strong correlation between these performance metrics. In this paper, we propose a multi-objective ant colony algorithm (MOACA) that maps IP cores onto mesh-based NoC architectures. This algorithm is an efficient way to find the pareto-optimal front which optimizes energy consumption and hotspot temperature of NoC. The algorithm has been implemented and evaluated for synthetic generated benchmarks. Experimental results confirm the efficiency, accuracy and scalability of the algorithm. © 2011 IEEE.

关键词： Network-on-chip

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Towards safe data flow processing by integration of design by contract in deterministic UML activities

Towards safe data flow processing by integration of design b...

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XXII International Symposium on Information, Communication and Automation Technologies, ICAT

作者： Zamira Daw Marcus Vetter Josef Boercsoek Institute of Embedded Systems Hochschule Mannheim-University of Applied Sciences Mannheim Germany Department of Computer Architecture and System Programming University of Kassel Kassel Germany

Data flow processing is a common task of embedded systems which is usually modeled as a pipeline. Errors in a block of this pipeline can be propagated through it thus leading to unexpected and erroneous behaviors. For safety related applications, this pipeline has to be able to identify and react to failures. The DMOSES model-driven development method uses deterministic UML activities to describe and implement data flow processing. This method ensures deterministic behavior of concurrent processing. Design by Contract defines formal, precise and verifiable interfaces for software components. We propose a development method for safe data flow processing based on the integration of this concept in deterministic UML activities. This integration allows the identification of errors by detection of contracts violation. This paper presents an extension of the DMOSES tool for contracts verification at the model level and their monitoring at runtime.

关键词： Unified modeling language Contracts Monitoring Embedded systems Object oriented modeling Safety Pins

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Analysis of outage probability for opportunistic decode-and-forward relaying network over asymmetric fading channels

Analysis of outage probability for opportunistic decode-and-...

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3rd International Conference on Ubiquitous and Future Networks, ICUFN 2011

作者： Majhi, Sudhan Qian, Hua Xiang, Weidong Addepalli, Sateesh Gao, Zhenguo School of Electrical and Electronic Engineering Nanyang Technological University Singapore Singapore Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences China Electrical and Computer Engineering University of Michigan Dearborn United States Advanced Architecture and Research Cisco Systems Inc. United States College of Automation Harbin Engineering University Harbin China

ISBN: (纸本)9781457711763

This paper analyzes the outage probability of opportunistic decode-and-forward relaying network over asymmetric fading channels where cooperative nodes are located at distributed locations and signals experience asymmetric and independent Rayleigh and Rician channels. The outage probability of such a wireless relaying network is theoretically derived in high SNR scenarios, which is thereafter verified through Monte-Carlo simulations. It is shown that the variation of the outage probability of a relaying network under different asymmetric channels is independent to the number of relay nodes. © 2011 IEEE.

关键词： Fading channels

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